Multiphase particle, manufacturing process and use thereof

Abstract

A multiphase particle has a multiphase structure comprising a first phase and a second phase and has an average particle size of 0.1-100 mm. The multiphase particle has a high bulk strength and a good interface binding power with the hardened cement and is particularly suitable for the toughening application of the hardened cement.

The invention claimed is: 
     
       1. A method for producing a multiphase particle, comprising:
 reacting at least one polyfunctional organic monomer and at least one polyfunctional inorganic monomer exhibiting a chemical reaction activity to the polyfunctional organic monomer in presence of at least one inorganic nanoparticle and at least one polyfunctional reactive hydrogen organic compound in presence of a catalyst or in absence of a catalyst, to obtain an organic-inorganic composite material in a solid form, and 
 comminuting the organic-inorganic composite material to obtain the multiphase particle, wherein the average particle size of the multiphase particle is at least 0.1 mm and at most 100 mm, 
 wherein the polyfunctional organic monomer is an organic compound having two or more isocyanate (—NCO) groups per molecule, 
 wherein the polyfunctional inorganic monomer is an inorganic compound having 2 or more—OH groups per molecule and/or a precursor thereof, and 
 wherein the polyfunctional reactive hydrogen organic compound is an organic compound containing two or more reactive hydrogen atoms per molecule. 
 
     
     
       2. The method according to  claim 1 , wherein the ratio of the total weight of said at least one polyfunctional organic monomer and said at least one polyfunctional reactive hydrogen organic compound to the total weight of said at least one polyfunctional inorganic monomer and said at least one inorganic nanoparticle is 1:1-5:1, and/or, the weight ratio of said at least one polyfunctional inorganic monomer to said at least one inorganic nanoparticle is 100:90-100:30, and/or, the ratio of the mole number of said at least one polyfunctional organic monomer (in terms of the functional group) to the mole number of said at least one polyfunctional reactive hydrogen organic compound (in terms of the reactive hydrogen) is 1.1:1-2:1. 
     
     
       3. The method according to  claim 1 , wherein the solid content of said aqueous solution or said sol is 20-70 wt %, and/or, the average particle size of said at least one inorganic nanoparticle is 150-500 nm. 
     
     
       4. The method according to  claim 1 , wherein said polyurethane prepolymer is formed by a polyreaction of said polyisocyanate and a polyol in presence of the catalyst or in absence of a catalyst, wherein a content of —NCO groups of said polyurethane prepolymer is 1-7 wt %,
 wherein the polyisocyanate is at least one selected from toluene diisocyanate, 4,4′-diphenylmethane diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, 1,4-cyclohexane diisocyanate, and naphthalene diisocyanate, 
 wherein the polyol is at least one selected from a polyether polyol and a polyester polyol, and 
 wherein the catalyst is selected from a carboxylate salt, a metal alkyl compound, a quaternary ammonium salt, a tertiary amine stannous octoate, potassium carboxylate, and dibutyl tin dilaurate. 
 
     
     
       5. The method according to  claim 1 , wherein the reacting step comprises:
 reacting said at least one polyfunctional organic monomer and said at least one polyfunctional reactive hydrogen organic compound in a predetermined ratio in presence of said catalyst or in absence of said catalyst to obtain a polyurethane prepolymer having a NCO content of 1-7 wt %; 
 mixing said at least one polyfunctional inorganic monomer and said at least one inorganic nanoparticle in a predetermined ratio to obtain a first mixture; 
 mixing the polyurethane prepolymer with the first mixture to obtain a second mixture; and curing the second mixture to obtain a solid. 
 
     
     
       6. The method according to  claim 5 , wherein in the step (1), the ratio of the mole number of said at least one polyfunctional organic monomer (in terms of the functional group) to the mole number of said at least one polyfunctional reactive hydrogen organic compound (in terms of the reactive hydrogen) is 1.1:1-2:1, and/or, in the step (2), the weight ratio of said at least one polyfunctional inorganic monomer to said at least one inorganic nanoparticle is 100:90-100:30, and/or, in the step (3), the condition for mixing the component A and the component B is: the weight ratio of the component A to the component B is 1:1-5:1, the stirring speed: 1500-2000 rpm, mixing time: 15-90 s, and mixing temperature: 30-90° C. 
     
     
       7. The method according to  claim 1 , wherein:
 the polyfunctional organic monomer is at least one selected from a C 4   +  aliphatic polyisocyanate, a C 4   +  cycloaliphatic polyisocyanate, an aromatic polyisocyanate, a polyurethane prepolymer derived from at least one of these polyisocyanates, and a polyurea prepolymer derived from at least one of these polyisocyanates, and/or 
 the polyfunctional inorganic monomer is at least one selected from a silica sol, an alumina sol, a zirconium sol, a titanium sol, a silicate ester, an aqueous silicate ester solution, a silicate salt, an aqueous silicate salt solution, an aluminate salt, an aqueous aluminate salt solution, a titanate ester, an aqueous titanate ester solution, a zirconate ester, an aqueous zirconate ester solution, and water, and/or 
 the inorganic nanoparticle is at least one selected from calcium carbonate nanoparticle, silica nanoparticle and hydrotalcite nanoparticle, and/or 
 the polyfunctional reactive hydrogen organic compound is at least one selected from a polyamine, a polycarboxylic acid, a polyphenol, a polythiol and a polyol, and/or the catalyst is at least one selected from a carboxylate salt, a metal alkyl compound, a quaternary ammonium salt, and a tertiary amine. 
 
     
     
       8. The method according to  claim 1 , wherein:
 the polyfunctional organic monomer is at least one selected from toluene diisocyanate, 4,4′-diphenylmethane diisocyanate, 4,4′-dicyclohexylmethane diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate, 1,4-cyclohexane diisocyanate, naphthalene diisocyanate, a polyurethane prepolymer derived from at least one of these diisocyanates, and a polyurea prepolymer derived from at least one of these diisocyanates, and/or 
 the polyfunctional inorganic monomer is at least one selected from silica sol and an aqueous silicate salt solution.